AVG is now history on this specific PC that had the issue.
I have now purchased and installed McAfee, since I have been told that ALL RA software is tested with it.
I used AVG Clear to uninstall AVG, and installation of McAfee was very swift with no issues. All of my RA software is running smoothly again.
Since my purchase of McAfee was for 10 devices, it quickly got rolled onto my iPhone, my iPad, and will soon be replacing AVG on my other desktop, my two existing laptops, and another laptop I have purchased which should be here in a few days.
AVG has a history of being more aggressive with each update, and this most recent issue with RA activations was the final straw. Everything had been OK until Friday last, when an AVG update was installed.
I'm not even going to bother to try to look at the above-mentioned PDF, since AVG will be history as far as I am concerned.
AVG's support centre has been closed due to COVID-19, and I can understand that, but it was closed before a credible alternative support network was established. I purchased their support offerings, but support via email with a 2-day turn-around, is not good, and I will be seeking recompense,
Goodbye AVG, hello McAfee.